Autotuning in cascaded systems based on a single relay experiment

Adaptive Cascade Generalized Predictive Control

“…The methods proposed by Hang et al [4] and Vivek and Chidambaram [5] need sequential application of the conventional relay-based auto-tuning approach, and are therefore still time consuming. The sequential tuning procedure has been improved so that only single relay experiment is required for auto-tuning [6]- [9]. However, an off-line or ad hoc experiment must be performed in these methods.…”

“…However, an off-line or ad hoc experiment must be performed in these methods. For example, Leva and Donida [6] performed test with relay cascaded to an integrator, and Mehta and Majhi [8] restricted the secondary controller to controller during the relay test. Besides the relay-based method, Visioli and Piazzi [10] proposed an automatic tuning method consisting of an open-loop test for cascade control system.…”

Simultaneous automatic tuning of cascade control systems from closed-loop step response data

“…The methods proposed by Hang et al [6] and Vivek and Chidambaram [7] need a sequential application of the conventional relay-based auto-tuning approach, and are therefore still time consuming. The sequential tuning procedure has been improved so that only a single relay experiment is required for auto-tuning [8][9][10][11]. However, an off-line or ad hoc experiment must be performed in these methods.…”

“…However, an off-line or ad hoc experiment must be performed in these methods. For example, Leva and Donida [8] performed a test with a relay cascaded to an integrator, and Mehta and Majhi [9] restricted the secondary controller to a P controller during the relay test. Besides the relay-based method, Visioli and Piazzi [12] proposed an automatic tuning method consisting of an open-loop test for a cascade control system.…”

Plant Identification by Relay Method

“…At present more publications exist which are devoted to identification or controller autotuning on the basis of the relay experiment, e.g. (Besançon-Voda & Roux-Buisson, 1997;Hang et al, 2002;Huang et al 2005;Johnson & Moradi, 2005;Kaya & Atherton, 2001; Lee et al, 1995;Leva & Donida, 2009;Leva & Maggio, 2009;Liu & Gao, 2009;Majhi, 2005;Majhi, 2007;Panda & Yu, 2003;Panda & Yu, 2005;Prokop et al, 2010;Sung et al, 2009;Tan et al, 2001;Tan et al, 2002;Vítečková & Víteček, 2005;Vivek & Chidambaram, 2005). The aim of this paper is to summarily describe and show the basic modifications of the relay methods from the viewpoint of experimental plant identification and to bring out the computational formulas for simple plants.…”